72400368
Aug 17, 1971
Mar 13, 1973
ABRASIVE BLASTING ROOMS COMPRISING A BLASTING GENERATOR AND NOZZLE MEANS FOR EXPELLING ABRASIVES, AIR VENTILATION AND DUST COLLECTING EXHAUSTING SYSTEMS FOR CONVEYING ABRASIVE DEBRIS AND DUST INTO RECLAIMING MEANS AND PARTS AND EQUIPMENT THERFOR
Yarns and ThreadsINFLATABLE RUBBER SEALS WHICH OPEN AND CLOSE CONVEYING DUCTS IN ABRASIVE BLASTING ROOM FLOORS
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